| Primary satellite | Secondary satellite |
| Name | SL-08 R/B | deb Delta |
| Spacetrack catalog number | 27819 | 21352 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 22 10:35 | 2021 Apr 22 08:33 |
| Time of closest approach (UTC) | 2021 Mar 02 16:24:59.587 |
| Minimum distance | 11.532 km |
| Height difference | -6.049 km |
| Relative speed | 14.728 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 70.0°N, 76.2°E |
| Height | 1032 km |
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